423240040 has 96 divisors (see below), whose sum is σ = 1002909600. Its totient is φ = 160692480.

The previous prime is 423239983. The next prime is 423240049. The reversal of 423240040 is 40042324.

It is not an unprimeable number, because it can be changed into a prime (423240049) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3230775 + ... + 3230905.

It is an arithmetic number, because the mean of its divisors is an integer number (10446975).

Almost surely, 2^423240040 is an apocalyptic number.

423240040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423240040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (501454800).

423240040 is an abundant number, since it is smaller than the sum of its proper divisors (579669560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

423240040 is a wasteful number, since it uses less digits than its factorization.

423240040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 423240040 is about 20572.7985456525. The cubic root of 423240040 is about 750.8080417047.

Adding to 423240040 its reverse (40042324), we get a palindrome (463282364).

The spelling of 423240040 in words is "four hundred twenty-three million, two hundred forty thousand, forty".